Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d6eaa5d8c5a9aa6…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 12:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06eda4d555c38de4c21ca8d3144b9248 SHA-1: 83f01357c43ed48f86be0104c3f34b178fb496a2 SHA-256: 6d6eaa5d8c5a9aa6e613c1eee9bbd24c185873ff85dd43eb2840d5c9877b3ed4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a guide for GTA 5. The document body and heuristics indicate a link farm strategy, likely to distribute malware or phishing content. The presence of multiple Shopify-hosted PDFs suggests an attempt to blend malicious links with seemingly benign content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=gta+5+online+solo+bunker+guide
    • http://files.pastorflater.com/uploads/1/3/0/9/130969061/8030602.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4578/9600/files/29819536970.pdf
    • https://cdn.shopify.com/s/files/1/0430/2100/9053/files/86222763117.pdf
    • https://cdn.shopify.com/s/files/1/0441/0913/6024/files/7866005320.pdf
    • https://cdn.shopify.com/s/files/1/0450/4079/5806/files/british_museum_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0435/5594/6647/files/dr_cindy_trimm_prayer.pdf
    • https://cdn.shopify.com/s/files/1/0429/0409/2839/files/anatomy_and_physiology_questions_and_answers_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2698/7680/files/98440963956.pdf
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/mibop.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/1466787374.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063ff.bin
d9712f70a2dff2967814250cda02e81fb993f7dd51eb12d0ae05a786c3c4e8a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63FF 5352 bytes
font_01_sfnt_off00007647.bin
46b5516ebca40bbff714094bec0ad1d13bd1878174217d9f4285d550ae032853		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7647 10840 bytes

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